CR

Atlantirivulus maricensis

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Atlantirivulus maricensis faces severe threats from urban expansion and agricultural development in its restricted coastal range near Rio de Janeiro, Brazil. The species' extremely limited distribution makes it particularly vulnerable to habitat degradation from pollution and water extraction. Infrastructure development and residential construction continue to fragment and destroy the small freshwater systems this killifish depends upon for survival.

Threat summary

Habitat

This critically endangered killifish inhabits small freshwater streams and coastal wetlands in the Atlantic Forest region of southeastern Brazil. The species is restricted to very specific aquatic microhabitats with particular water chemistry and vegetation characteristics in the Maricá municipality area.

FRESHWATER· major

Other threatened species in RIVULIDAE

EN

Flame Rivulus

Cynodonichthys uroflammeus

Unknown
CR

Campellolebias brucei

Unknown
CR

Hypsolebias gilbertobrasili

Unknown
CR

Kryptolebias campelloi

Unknown

Frequently asked questions

Why is Atlantirivulus maricensis classified as Critically Endangered?
Atlantirivulus maricensis is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Atlantirivulus maricensis faces severe threats from urban expansion and agricultural development in its restricted coastal range near Rio de Janeiro, Brazil. The species' extremely limited distribution makes it particularly vulnerable to habitat degradation from pollution and water extraction. Infrastructure development and residential construction continue to fragment and destroy the small freshwater systems this killifish depends upon for survival.
Where does Atlantirivulus maricensis live?
Atlantirivulus maricensis occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Atlantirivulus maricensis?
The main threats to Atlantirivulus maricensis are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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